All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=766576

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=46f9b78fcb22d4d7582a855770afbeff396b7e8e8ee0cb15f6b1d74de23b8f38


Bot(s) for this bug's original alert(s):

android-nexus5

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968030424698759920

=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : Mike Klein
  Commit : 7a620575b0512b33708e723c260fe66b90b5b103
  Date   : Sat Sep 16 02:20:04 2017
  Subject: Revert "Reland "zlib: inflate using wider loads and stores""

Bisect Details
  Configuration: android_nexus5_perf_bisect
  Benchmark    : blink_perf.image_decoder
  Metric       : decode-png/decode-png
  Change       : 17.52% | 326.825333333 -> 384.072208333

Revision             Result                  N
chromium@502459      326.825 +- 10.2284      6      good
chromium@502470      332.337 +- 6.68193      6      good
chromium@502473      332.073 +- 11.0009      6      good
chromium@502474      381.901 +- 9.89996      6      bad       <--
chromium@502475      383.113 +- 9.43069      6      bad
chromium@502480      381.448 +- 8.56218      6      bad
chromium@502500      384.072 +- 16.1108      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests blink_perf.image_decoder

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8968030424698759920


For feedback, file a bug with component Speed>Bisection